Superior quality and design at the price you will love! Strong construction and sturdiness for all tough weight lifting training! Our Multipurpose Heavy Duty Crumb Bumper Plates are built for cross-training/HIIT workouts and Olympic weightlifting. After completing a lift, you can drop them safely, no damaging to the bar and floor, quieter and safer overhead or shoulder height drops than old-school iron plates. Stainless steel insert fits all 2''Olympic bars, increase durability than brass inserts. No rust. Thicker 10 lb. plates are designed to resist bending, not like other easily bend plates. Factory tested to withstand over 15000 drops from 6' for 10/15 lb. and 20,000 drops for 25/35/45 lb. Use for both commercial and home gyms. Material: Recycled Vulcanized Rubber Diameter: 17.7'' / 450mm 2'' Stainless Steel insert Weight Tolerance: +/-0.5% 10 lb. plate width 1.17'' 15 lb. plate width 1.3'' 25 lb. plate width 2.2'' 35 lb. plate width 2.67'' 45 lb. plate width 3.3''